Block link basicBlock link basic You will be able to understand mechanisms that transmit force and motion, such as gears and link mechanisms! A basic set for learning about gears and link mechanisms. Includes four example manuals. The finished size will vary depending on the piece you create. Battery box x 1, DC motor x 1, large gear x 4, small gear x 2, basic square red x 2, basic square yellow x 3, basic square water x 6, basic square light green x 4, half blue x